in fact, science changes. nothing is more worthless than a science textbook from the '50s. >> the word shouldn't change from the original constitution, surely. >> my words aren't based on the constulation. >> i get that, but what it is is about fairness and equality. i went to see "lincoln" the movie a few weeks ago. it was a riveting movie. daniel day-lewis was great as lincoln. it was all about how he fought in his last few months as president to get slavery abolished. there were millions of americans who thought slavery was acceptable who were out raged ought what he was doing. he knew instinctively it was just wrong, unfair, unequal. >> and why did he know that? because it's in the bible. >> but we -- >> it's in the bible. he was building it on biblical truth. the bible says that every man should be free. >> right, but you don't think every man should be free and equal. >> no -- of course we're free. and of course we're equal. >> what does that mean? >> you can love anybody you want to. >> but you don't th